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The Lopan (Russian and Ukrainian: Лопань) is a river that rises in Belgorod Oblast of Russia and flows across the Russian-Ukrainian border into Kharkiv Oblast where it joins the Udy in Kharkiv. The river is 93 kilometres (58 mi) long. The river Kharkiv is one of its tributaries.
The Lopan in Kharkiv, Ukraine
Rivers of Ukraine by tributary or drainage basin
